[PATCH 5.10 105/717] drm/amdgpu: fix compute queue priority if num_kcq is less than 4

Greg Kroah-Hartman
2020-12-28T15:17:33Z

From: Nirmoy Das <nirmoy.das@amd.com>

[ Upstream commit 3f66bf401e9fde1c35bb8b02dd7975659c40411d ]

Compute queues are configurable with module param, num_kcq.
amdgpu_gfx_is_high_priority_compute_queue was setting 1st 4 queues to
high priority queue leaving a null drm scheduler in
adev->gpu_sched[hw_ip]["normal_prio"].sched if num_kcq < 5.

This patch tries to fix it by alternating compute queue priority between
normal and high priority.

Fixes: 33abcb1f5a1719b1c (drm/amdgpu: set compute queue priority at mqd_init)
Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 10 +++++++---
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h | 2 +-
drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 6 ++++--
drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 6 ++++--
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 7 +++++--
5 files changed, 21 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
index 8c9bacfdbc300..c485ec86804e5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
@@ -193,10 +193,14 @@ static bool amdgpu_gfx_is_multipipe_capable(struct amdgpu_device *adev)
}

bool amdgpu_gfx_is_high_priority_compute_queue(struct amdgpu_device *adev,
- int queue)
+ int pipe, int queue)
{
- /* Policy: make queue 0 of each pipe as high priority compute queue */
- return (queue == 0);
+ bool multipipe_policy = amdgpu_gfx_is_multipipe_capable(adev);
+ int cond;
+ /* Policy: alternate between normal and high priority */
+ cond = multipipe_policy ? pipe : queue;
+
+ return ((cond % 2) != 0);

}

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
index 258498cbf1eba..f353a5b71804e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
@@ -373,7 +373,7 @@ void amdgpu_queue_mask_bit_to_mec_queue(struct amdgpu_device *adev, int bit,
bool amdgpu_gfx_is_mec_queue_enabled(struct amdgpu_device *adev, int mec,
int pipe, int queue);
bool amdgpu_gfx_is_high_priority_compute_queue(struct amdgpu_device *adev,
- int queue);
+ int pipe, int queue);
int amdgpu_gfx_me_queue_to_bit(struct amdgpu_device *adev, int me,
int pipe, int queue);
void amdgpu_gfx_bit_to_me_queue(struct amdgpu_device *adev, int bit,
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index 55f4b8c3b9338..4ebb43e090999 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -4334,7 +4334,8 @@ static int gfx_v10_0_compute_ring_init(struct amdgpu_device *adev, int ring_id,
irq_type = AMDGPU_CP_IRQ_COMPUTE_MEC1_PIPE0_EOP
+ ((ring->me - 1) * adev->gfx.mec.num_pipe_per_mec)
+ ring->pipe;
- hw_prio = amdgpu_gfx_is_high_priority_compute_queue(adev, ring->queue) ?
+ hw_prio = amdgpu_gfx_is_high_priority_compute_queue(adev, ring->pipe,
+ ring->queue) ?
AMDGPU_GFX_PIPE_PRIO_HIGH : AMDGPU_GFX_PIPE_PRIO_NORMAL;
/* type-2 packets are deprecated on MEC, use type-3 instead */
r = amdgpu_ring_init(adev, ring, 1024,
@@ -6360,7 +6361,8 @@ static void gfx_v10_0_compute_mqd_set_priority(struct amdgpu_ring *ring, struct
struct amdgpu_device *adev = ring->adev;

if (ring->funcs->type == AMDGPU_RING_TYPE_COMPUTE) {
- if (amdgpu_gfx_is_high_priority_compute_queue(adev, ring->queue)) {
+ if (amdgpu_gfx_is_high_priority_compute_queue(adev, ring->pipe,
+ ring->queue)) {
mqd->cp_hqd_pipe_priority = AMDGPU_GFX_PIPE_PRIO_HIGH;
mqd->cp_hqd_queue_priority =
AMDGPU_GFX_QUEUE_PRIORITY_MAXIMUM;
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index 94b7e0531d092..c36258d56b445 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -1915,7 +1915,8 @@ static int gfx_v8_0_compute_ring_init(struct amdgpu_device *adev, int ring_id,
+ ((ring->me - 1) * adev->gfx.mec.num_pipe_per_mec)
+ ring->pipe;

- hw_prio = amdgpu_gfx_is_high_priority_compute_queue(adev, ring->queue) ?
+ hw_prio = amdgpu_gfx_is_high_priority_compute_queue(adev, ring->pipe,
+ ring->queue) ?
AMDGPU_GFX_PIPE_PRIO_HIGH : AMDGPU_RING_PRIO_DEFAULT;
/* type-2 packets are deprecated on MEC, use type-3 instead */
r = amdgpu_ring_init(adev, ring, 1024,
@@ -4433,7 +4434,8 @@ static void gfx_v8_0_mqd_set_priority(struct amdgpu_ring *ring, struct vi_mqd *m
struct amdgpu_device *adev = ring->adev;

if (ring->funcs->type == AMDGPU_RING_TYPE_COMPUTE) {
- if (amdgpu_gfx_is_high_priority_compute_queue(adev, ring->queue)) {
+ if (amdgpu_gfx_is_high_priority_compute_queue(adev, ring->pipe,
+ ring->queue)) {
mqd->cp_hqd_pipe_priority = AMDGPU_GFX_PIPE_PRIO_HIGH;
mqd->cp_hqd_queue_priority =
AMDGPU_GFX_QUEUE_PRIORITY_MAXIMUM;
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 0d8e203b10efb..957c12b727676 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -2228,7 +2228,8 @@ static int gfx_v9_0_compute_ring_init(struct amdgpu_device *adev, int ring_id,
irq_type = AMDGPU_CP_IRQ_COMPUTE_MEC1_PIPE0_EOP
+ ((ring->me - 1) * adev->gfx.mec.num_pipe_per_mec)
+ ring->pipe;
- hw_prio = amdgpu_gfx_is_high_priority_compute_queue(adev, ring->queue) ?
+ hw_prio = amdgpu_gfx_is_high_priority_compute_queue(adev, ring->pipe,
+ ring->queue) ?
AMDGPU_GFX_PIPE_PRIO_HIGH : AMDGPU_GFX_PIPE_PRIO_NORMAL;
/* type-2 packets are deprecated on MEC, use type-3 instead */
return amdgpu_ring_init(adev, ring, 1024,
@@ -3383,7 +3384,9 @@ static void gfx_v9_0_mqd_set_priority(struct amdgpu_ring *ring, struct v9_mqd *m
struct amdgpu_device *adev = ring->adev;

if (ring->funcs->type == AMDGPU_RING_TYPE_COMPUTE) {
- if (amdgpu_gfx_is_high_priority_compute_queue(adev, ring->queue)) {
+ if (amdgpu_gfx_is_high_priority_compute_queue(adev,
+ ring->pipe,
+ ring->queue)) {
mqd->cp_hqd_pipe_priority = AMDGPU_GFX_PIPE_PRIO_HIGH;
mqd->cp_hqd_queue_priority =
AMDGPU_GFX_QUEUE_PRIORITY_MAXIMUM;
--
2.27.0